Mini usb stick usb 20 stick memory size 4 gb read speed 165 mbs write speed 65 mbs backward compatible with usb 11 memory type flash memory material plastic series intenso micro line manufacturers warranty 2 years weight 2 g additional information read and write speed may vary depending on the capacity compatible operating systems linux 24 mac os x 106 windows xp windows vista windows 7 windows 8 windows 10 fastener with cap colour black